Replies

1. 
   Sphere | May 17, 2004 10:34pm | #1

   if yer using deck boards why the slope? the top is not solid.

   is the roof sloped?

   I'd do the sleepers to match the roof slope and the deck level, so I'd go with cut side down..remove the sleeper material to accomodate the uphill of the roof.

   a T&g deck surface I'd slope cuz the water can't run through the cracks..

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2. 
   DanH | May 17, 2004 10:48pm | #2

   Most PT is not uniformly saturated -- the cut side will be relatively untreated. If the material is going to be sitting on a sometimes-wet surface, having the factory side down would put the treatment where it does the most good. However, you then have the (relatively) untreated side facing up, catching the rain, so it would probably be a good idea to at least go over the cut surface with some sort of sealer/preservative.

1. 
   Remmah | May 18, 2004 12:17am | #3

   Roof is sloped - sleepers will account for slope to create a flat deck.  Dan, thanks for the thoughts - recommendations on sealer/preservative?

1. 
   DanH | May 18, 2004 03:05am | #4

   Alas, there ain't no good ones, just a bunch that are so-so (and the selection varies as the pollution laws change). Definitely not Thompson's, of course.

2. 
   Buglehead | May 22, 2004 08:58am | #5

   Use the green copper napthanate preservative.  Jasco Termin-8 is one brand.  Wear gloves, glasses, and a respirator.  Nasty stuff, but effective.

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3. 
   reinvent | May 22, 2004 03:18pm | #6

   Just a thought. If you opt to put the cut side down you may want to use an 1/8" round over on it so it dosent cut into the EPDM.

4. 
   andybuildz | May 22, 2004 04:19pm | #7

   I'd add a second strip of EPDM (?)under each sleeper with a self sealing membrane.

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1. 
   Remmah | May 24, 2004 07:02pm | #8

   Good suggestions all round.  I cut strips of extra EDPM an inch or two wider than the tapered 2x sleepers and spot torched them onto the existing roof membrane.  Granulated side up so it doesn't act like sandpaper on the membrane.  Placing the slepper cut side down produced an even surface for the decking.  I will seal the exposed cut with JASCO most likely.  Interesting that the new PT wood seems to have inconsistent preservative penetration.   

1. 
   DIYER | May 24, 2004 11:21pm | #9

   may be a dumb question, but what does EPDM stand for?

1. 
   Sphere | May 24, 2004 11:23pm | #10

   Ethylene-propylene-diene monomer

     edit for spell check with google

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   Edited 5/24/2004 4:24 pm ET by SPHERE

1. 
   Remmah | May 25, 2004 03:10am | #11

   Its a roof membrane utilized on "flat roofs" that is torched down.  Many insurance carriers are not excited by roofing subcontractors utilizing the material because of the fire risk.  Great stuff with a granulated textured surface.